Gas-purifier.



UNITED STATES PATENT couver BENT, OF LEBANON.irjnNnSrnvAmn': 'f

Specification of j lllettersllatent.

l lfflatented: March22(7),1966.y

To all whom it may concern):

Be it known that'I, QUINCY BENTga citizen of the United States, residing at Lebanon, in

the county ofLebanon and State of Pennsylvania, have invented certain new and useful `Improvements in Gas-Purifiers, of which the following is a full clear, and exact description,

reference being had to the accompanying drawings, of which- Figure 1 is a'medial vertical section. Fig. 2 is a full section on line Fig. 1.v Fig. 3 is a full section on line y y, Fig. 1.

The objectv of this invention is to provide an improved apparatus for separating dust from air or gas, the same being more particularly designed for the extraction ofl dust from blast-furnace gas. A

The precise nature of the invention will appear from the following description in connection with the accompanying drawings.

In said drawings, 1 is the case of the apparatus, which is divided into a lower chamber 2 and an upper chamber 3.

There is a central opening 4 in the bottomof chamber 2 and a similar opening in the top thereof, the iirst opening communicating with an inletpipe 6, that leads from the lsource of the gas to be treated, and the second opening with the chamber 3. The latter has an opening 7 at the top that communicates with anoutlet-pipe 8. Extending centrally through the chambers and the said several openings is a rotatable shaft 9, that is adapted to be driven from a source of power. In the present instance this shaft is journaled in a bearing 1() of the outlet -pipe 8 and in'a'step-bearing 11 of the inlet-pipe 6. Within the chamber 2 is a fan 12, of ordinary construction, which is mounted on the shaft 8 and within the chamber 3, and also mounted on the shaft is a similar fan 13. Extending, preferably vtangentially, as shown, from the perlphery of foundation. (Not shown.)

z Having thus described myinvention, lI shall-snow describe the` mode'jof operation thereof, asl follows;-v Premisingfthat the gas to be treated is forced -or drawn through the apparatusby` any suitable means, `soyzthat if the fans were not running, theV currentf gays would. be direct., from lftheopjening through the openings and 7. The shaft 9, being driven ata suitable speed lin the direction ofthe arrow in 3, the dust-,laden gas entering chamber 2 by way of opening 4 is diverted. by the fan 12 from its natural direct course kand thrown outwardly towardthe periphery lof said chamber, and at the same l.time the heavier dust particles thrownv to said periphery and not able 4to return to? the center,

owing to theirweight,l -escape throughthe e openings14 -into .the pipes" 15.-A' The gas with the lighter dustlparticles not removed. by

this first fan passes onwardly to. and .escapes through thecontracted opening "5 intothe l chamber 3 and is there acted upon by the fan 13, whereby the dust particlesin like Ema-nner escape by way of the openings 17- into the pipe 18, and the cleansed gas Apasses-through the opening 7 and out by way of the exit-pipe 8. The upper chamber 3 and the fan 13 are preferably of greater area than the lower chamber 2 and the fan therein, as shown, so that the currents of air in the former will have greater linear velocity than in the latter chamber-that is, sufficient to separate and discharge into the openings 17 the lighter dust particles that have entered chamber 3 from chamber 2. The purpose of the lattices .e

or screens 16 and 19 is to obstruct the openings 14 and 17 sufliciently to cause what may be termed a dead current lof air in the spaces 20 beyond'the lattices. The latter may, however, sometimes be dispensed with.

In order to temporarily retain the dust in the pipes 15 and 18, I sometimes provide a valve 21 in each of said pipes, which valves are adapted to be operated from the outside to open or close or partially open the said pipes,

respectively. I also sometimes secure to the hub of the fan 12-that is, to the shaft 9- a horizontal deiiecting-disk 22 for the purpose of preventing any direct passage of the gas from the`chamber 2-in other words, to assure the throwing out of practically all the gas to and beyond the periphery of the fan before passing up through 'the opening 5 to chamber 3, and Iyalso sometimes secure a imilar disk 23 fora likepurpose to the hub of .IOO

If required, there may be a greater number of similar chambers and fans than that shown in the drawings and sometimes a single chamber and fan will suflice.

While in the form of the invention shown in the drawings the chambers and fans are disposed horizontally, the latter being on a vertical shaft, the shaft may be horizontal and the fans and chambers vertically disposed.

I also remark that while I have termed my apparatus a gas-washer it may also be used for extracting dust from air.

Having thus described the construction an manner of use of my invention, I claim as new and desire to secure by Letters Patentl. In an apparatus of the character recited, the combination of the casing, the chamber therein having the central contracted inlet and outlet openings and the peripheral openings, the screens in the latter, the rotatable shaft extending through said chamber, and the fan Within the latter mounted on said shaft, substantially as set forth.

2. In an apparatus of the character recited, the combination of the casing, the chamber therein having the central contracted inlet and outlet openings, and the peripheral op enings,the screens in the latter, the rotatable shaft extending through said chamber, the fan Within the latter and mounted on said shaft and the deiieeting -disk within said chamber and carried by said shaft, substantially as set forth.

3. In an apparatus of the character recited,

the iirst and second chambers and a similarv outlet-opening from the latter chamber, substantially as set forth.

4. In an apparatus of the character recited, the combination of the casing, the chamber therein having the central contracted inlet and outlet openings, the rotatable shaft extending through said chamber, the fan within. the latterand mounted on said shaft, said chamber having also the peripheral vertical openings extending the height of said chamber and the pipes communicating with said peripheral openings respectively, and the valve within said pipes, substantially as set forth..

In testimony whereof I have hereunto afiixed my signature this 28th day of May, A. D. 1904.

QUINCY BENT. 

